Improvement in apparatus for separating gas-tar and ammoniacal liquors



tnitetl gratta @anni dimite.

EDWIN D. McCRACKENjOF NEWYORK, N. Y.

Letters Patent No. 108,499, dated October 18, 1870.

The Schedule referred to in these Letters Patent and making part of thesame To all whom it may concern:

Be it known that I, EDWIN D. MGCRACKEN, of the city, county, and State.of New VYork, have invented` a new and useful Improvement iu Apparatusfor the Manufacture of Gas; and I hereby declare that the following is afull, clear, and exact descrip-` tion of the same, reference being hadto the accompanying drawing.

lhis'invention relates to the separation of the ammoniacal liquor fromthe tar, and to the taking ot' them away separately from the hydraulicmain of a gas-retort or bench ot' gas-retorts. It is more especiallyintended to be used in connection with the improvements which are thesubject of my Letters Patent, dated July 12,1S70, or with other means ofreturning the tar from the hydraulic main to the retort, its object insuch case being to prevent the ammoniacal liquor from beingr thusreturned along the tar.

The invention consists in the connection withthe hydraulic main of atrap so arranged relatively to the pipe or'orice through which the tarescapes, that the ammoniacal liquor ioating upon the tar in thehydraulicmain may overflow separately through 'the saidy trap.

The drawing illustrates, by a vertical sectional view, the applicationof theinv'ention in connection with the improvements which constitutethe subject of my Letters Patent hereinbetbre referred to. B is thestand-pipe;

C is the hydraulic main;

Disthe pipe through which the tar returns tothe retort; E is the chamberarranged between the said pipe and the retort, to provide for theintroduction ot superheated steam along with the tar; and

1*" and G are the pipes connectingr the said chamber with' the hydraulicmain and'wth the pipe D, respectively, the said chamber serving also asa trap to prevent the escape of gas `from the retort. These` devices areall arranged as described in my beforementioned Letters Patent. Y l

The ammoniacal liquor-trap, which constitutes the invention, is shown onthe left-hand side of the hy i draulic main.

It consists ot'` a vessel, H, connected with the hydraulic main by apipe, I, and having an overowpipe, J.

The pipe I communicates with the hydraulic main at a level above thatindicated by the heavy line c c, at which the tar is maintained bythetar-trap F E G, and it descends from the hydraulic main to the vessel H.

Thebottoln of' the oritice of communication of the pipe J with thevessel H is at such level, a little above. the tar-line cc, as indicatedb'y the linea @as it is desired that the ammoniacal liquor shall overflow. The vessel H and pipes I and J forniin effect an inverted Siphon,such as iscommonly used for traps in hydraulic apparatus, and permitsthe overflow of the ammoniacal liquor withoutthe escape of gas, and, theescape of tar through it is prevented by its arrangement at a higherlevel than the trap F E G. The pipe J le'ads to any suitable receptacleprovided for the ammoniacal liquor.

\Vhat I claim, `as my invention, is-

In combination with a gas-main, a double trap, substantially as hereindescribed, so as to separate the tar and ammoniacal liquor,l as setforth.

E. D. MCGKAGKEN.

Witnesses FRED. HAYNns, ARTHUR KInNIE-n.

